Fossil Fuels are coal, oil, and natural gas. A way of remembering all the fossil fuels is CON in CONserve the C stands for coal the O stands for oil and the N stands for natural gas. The earliest place coal was discovered and used was in China. In 48 states coal was found and the rest of the states mined out of the ground. Oil was formed more than 300 million years ago. Oil can also convert sunlight directly into stored energy. Natural gas is surprising lighter than air. It is also mostly made of a gas called methane. Fossil fuels take a VERY long time to make. we have ben using them more than 300 million years before dinosaurs.